Yep, as spotted by The Walking Dead Twitter account, that's the room in which Adam and Lawrence were locked inside of and forced to sever their own legs in back in 2004. It's a possibility that the entire facility was actually the set of the hallways in the same facility seen in the later installments of the Saw franchise.

One has to wonder if this is executive producer Greg Nicotero trying to be sly and indicate that The Walking Dead exists in the Saw universe (probably not) or just another one of the many Easter Eggs the show likes to incorporate (probably).